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Adrien has 4 liters of Milk.He drinks y liters each day.

If Adrien has x liters of milk left one week, express x in terms of y.

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4= litri totali
7= giorni della settimana
Y= quantità di latte consumata in un giorno
X= quantità di latte NON consumata in un giorno.

7y+7x = 4
x = (4 - 7y) /7

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